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/*Copyright (c) 2011, Florent DEVILLE.                                      */
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#pragma once

#ifndef CLIGHT_H
#define CLIGHT_H

#include "RTILight.h"

namespace RT
{
	/*Represent a point light*/
	class RTPointLight : public RTILight
	{
	private:
		//center in the world coordinates
		RTVector3f m_center;	

		//center in view coordinates
		RTVector3f m_viewCenter;

		//distance attenuation
		RTVector3f m_attenuation;

		//light color
		RTColor m_color;

	public:
		/*Constructor*/
		RTPointLight(const RTVector3f& center, const RTColor& color, const RTVector3f& attenuation);

		/*Destructor*/
		~RTPointLight();

		/*Calculate the color of the light*/
		RTColor computeColor(const RTRay& ray, F32 dist)const;

		/*Calculate the shadow ray between a point and the light*/
		void computeShadowRay(const RTVector3f& point, RTRay& shadowRay, F32* distance)const;

		/*Apply the view matrix to the light*/
		void applyViewMatrix(const RTMatrix44& view);

		/*Set the light position*/
		void setPosition(const RTVector3f& position);

	};
}
#endif